Duncan LLC

Duncan LLC, doing business as Duncan Co, is a for-profit limited liability company based in Minneapolis, Minnesota, that has been registered to conduct federal business since January 2010. The company is a self-certified small disadvantaged business that serves as a prime contractor for the federal government, providing specialized industrial equipment and components to support federal agency operations and infrastructure. Duncan Co specializes in the procurement and delivery of critical control valves and safety equipment used in industrial and institutional applications.

Duncan LLC has secured federal prime contract awards totaling approximately $521,540 in ceiling value across multiple contract vehicles. The company's primary federal work includes the provision of chemical control valves to the Army Test and Evaluation Command under a firm fixed-price purchase order awarded on September 26, 2024, designated as a Total Small Business set-aside and scheduled for completion by March 5, 2025. Additionally, Duncan LLC was awarded a purchase order by the Federal Correctional Institution Sandstone on October 23, 2025, for a vacuum breaker device designed to prevent backflow of contaminated water into potable water supplies serving institutional facilities, inmates, and staff. The company has also functioned as a subcontractor, with a notable subcontracting engagement on November 23, 2021, under Integration Innovation Inc., where Duncan Co provided comprehensive procurement and delivery services for RSH valves, including fabrication, labor, equipment, materials, shipping, and hydrostatic testing of complete valve assemblies with flange ends. This subcontracting experience demonstrates Duncan LLC's technical capabilities in valve manufacturing and quality assurance protocols required for federal compliance.